# while input("请输入") != "q":
#     print("hello")
# else:
#     print("world")

# range(10)
# range(2, 10, 2)
# range(10, 50)
# a = [1, 2, 3, 4, 5]
# for b in range(15, 14, -1):
#     print(b)
# else:
#     pass

# print(ord("s"))
# print(chr(114))
